Computer Exchange appear to be getting rid of all their remaining GBA/PSX stock for the new year and have reduced them heavily. This is what I can see on thier website:
PlayStation Consoles £2
PS LCD Screen £3
PS Accessories/Games £0.10
GBA Consoles £2-£4
GBA Games £0.50-£0.75
Mostly instore stuff left now so go to "refine your search" and select your nearest store to see what they have left.
***£2 minimum spend for FREE online delivery***